CVE-2025-14550: Djangoproject Django

High severity, CVSS 7.5. EPSS: 1.1% chance of exploitation in the next 30 days.

An issue was discovered in 6.0 before 6.0.2, 5.2 before 5.2.11, and 4.2 before 4.2.28. `ASGIRequest` allows a remote attacker to cause a potential denial-of-service via a crafted request with multiple duplicate headers. Earlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected. Django would like to thank Jiyong Yang for reporting this issue.

Affected products

• Djangoproject Django: from 4.2, before 4.2.28 (fixed in 4.2.28); from 5.2, before 5.2.11 (fixed in 5.2.11); from 6.0, before 6.0.2 (fixed in 6.0.2)

Published 2026-02-03. Last modified 2026-06-17.